Ground motion amplification due to elastic inclusions in a half-space

1983 ◽  
Vol 11 (3) ◽  
pp. 313-335 ◽  
Author(s):  
Marijan Dravinski
Keyword(s):  
Half Space ◽  
Ground Motion ◽  
Ground Motion Amplification ◽  
Elastic Inclusions

Ground-motion amplification by topographic depressions for incident P wave under acoustic approximation

1977 ◽  
Vol 67 (2) ◽  
pp. 345-352
Author(s):  
Shri Krishna Singh ◽  
Federico J. Sabina
Keyword(s):  
Free Surface ◽  
Half Space ◽  
Ground Motion ◽  
Cylindrical Cavity ◽  
Analytic Solutions ◽  
P Wave ◽  
Saturated Soils ◽  
Ground Motion Amplification ◽  
Topographic Depressions ◽  
Acoustic Approximation

Abstract Ground-motion amplification caused by a semi-spherical and a semi-cylindrical cavity in a half-space for an incident P wave is calculated from analytic solutions under acoustic approximation. We expect this approximation to be valid for materials with a Poisson's ratio near 0.5, e.g., saturated soils. The ground motion is zero at the edges of the cavity and is normal to the free surface. An amplification of about 2 to 3 occurs near the bottom of the cavity for large wavelengths. Detailed numerical results are given for vertical incidence.

Nonlinear ground-motion amplification by sediments during the 1994 Northridge earthquake

Nature ◽  
10.1038/37586 ◽  
1997 ◽  
Vol 390 (6660) ◽  
pp. 599-602 ◽  
Author(s):  
Edward H. Field ◽  
Paul A. Johnson ◽  
Igor A. Beresnev ◽  
Yuehua Zeng
Keyword(s):  
Ground Motion ◽  
Northridge Earthquake ◽  
Ground Motion Amplification ◽  
1994 Northridge Earthquake

Ground-motion amplification at the Colle di Roio ridge, central Italy: a combined effect of stratigraphy and topography

2016 ◽  
Vol 206 (1) ◽  
pp. 1-18 ◽  
Author(s):  
S. Hailemikael ◽  
L. Lenti ◽  
S. Martino ◽  
A. Paciello ◽  
D. Rossi ◽  
...  
Keyword(s):  
Ground Motion ◽  
Central Italy ◽  
Combined Effect ◽  
Ground Motion Amplification

scholarly journals Physical stratigraphy and geotechnical properties controlling the local seismic response in explosive volcanic settings: the Stracciacappa maar (central Italy)

2020 ◽  
Vol 80 (1) ◽  
pp. 179-199
Author(s):  
M. Moscatelli ◽  
G. Vignaroli ◽  
A. Pagliaroli ◽  
R. Razzano ◽  
A. Avalle ◽  
...  
Keyword(s):  
Seismic Response ◽  
Ground Motion ◽  
Central Italy ◽  
Volcanic Event ◽  
Ground Motion Amplification ◽  
Local Seismic Response ◽  
Single Station ◽  
Seismic Scenarios ◽  
Physical Stratigraphy ◽  
Subsoil Model

AbstractNowadays, policies addressed to prevention and mitigation of seismic risk need a consolidated methodology finalised to the assessment of local seismic response in explosive volcanic settings. The quantitative reconstruction of the subsoil model provides a key instrument to understand how the geometry and the internal architecture of outcropping and buried geological units have influence on the propagation of seismic waves. On this regard, we present a multidisciplinary approach in the test area of the Stracciacappa maar (Sabatini Volcanic District, central Italy), with the aim to reconstruct its physical stratigraphy and to discuss how subsoil heterogeneities control the 1D and 2D local seismic response in such a volcanic setting. We first introduce a new multidisciplinary dataset, including geological (fieldwork and log from a 45-m-thick continuous coring borehole), geophysical (electrical resistivity tomographies, single station noise measurements, and 2D passive seismic arrays), and geotechnical (simple shear tests performed on undisturbed samples) approaches. Then, we reconstruct the subsoil model for the Stracciacappa maar in terms of vertical setting and distribution of its mechanical lithotypes, which we investigate for 1D and 2D finite element site response analyses through the application of two different seismic scenarios: a volcanic event and a tectonic event. The numerical modelling documents a significant ground motion amplification (in the 1–1.5 Hz range) revealed for both seismic scenarios, with a maximum within the centre of the maar. The ground motion amplification is related to both 1D and 2D phenomena including lithological heterogeneity within the upper part of the maar section and interaction of direct S-waves with Rayleigh waves generated at edges of the most superficial lithotypes. Finally, we use these insights to associate the expected distribution of ground motion amplification with the physical stratigraphy of an explosive volcanic setting, with insights for seismic microzonation studies and local seismic response assessment in populated environments.

Numerical simulation of ground motion amplification in Modong area, Lushan

2019 ◽  
Vol 16 (3) ◽  
pp. 277-290
Author(s):  
Chao Han ◽  
Jiashun Yu ◽  
Wei-Zu Liu ◽  
Jian-Long Yuan ◽  
Xiao-Bo Fu ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Ground Motion ◽  
Ground Motion Amplification

Evaluation of the Ground Motion Amplification at Poggio Picenze (Italy)

2014 ◽  
pp. 1077-1080 ◽  
Author(s):  
Nicola Tarque ◽  
Carlo G. Lai ◽  
Francesca Bozzoni ◽  
Enrico Miccadei ◽  
Tommaso Piacentini ◽  
...  
Keyword(s):  
Ground Motion ◽  
Ground Motion Amplification
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